how to send ctrl-Z in C language - modem interfacing

[abhay]

hi,i m interfacing gsm modem to my microcontroller.i need to send sms
through it.
i am using AT commands for that.the command to send sms (AT+ CMGS)
terminates with
ctrl-Z.now in my program i hav tried all ways to send ctrl-Z at end of
my sms.but it takes this as
a character or string only.also i tried with ascii value of ctrl-Z but
of no use.

i am able to see the transmitted commands on hyper-terminal through
serial interface & also on serail window while debugging.
the commands are as follows with 2ms delay between each of them.

AT , AT+CMGF = 1, AT+CMGS = mobile no. , "message to be sent " ctrl-Z /
26 / ^Z


plz suggest some way.suggestions are also invited if you suspect some
other problem

 

[Eric Sosman]

hi,i m interfacing gsm modem to my microcontroller.i need to send sms
through it.
i am using AT commands for that.the command to send sms (AT+ CMGS)
terminates with
ctrl-Z.now in my program i hav tried all ways to send ctrl-Z at end of
my sms.but it takes this as
a character or string only.also i tried with ascii value of ctrl-Z but
of no use.

fprintf (stream, "whatever\032");
fflush (stream); /* or use setvbuf() after fopen() */

 

[Richard Bos]

fprintf (stream, "whatever\032");
fflush (stream); /* or use setvbuf() after fopen() */

And, critically, do this on a binary stream, not on a text stream.

Richard

 

[ram.r]

SMS sending and receiving issues.

Dear Abhay and co,

I recently switched from Windows to Linux. Needless to say I am new to serial programming under Linux and C.
I learnt how to from,
http://www.easysw.com/~mike/serial/serial.html

I am trying to write a program in C to send and receive SMS. I am having also sorts of problems. Would it be possible to post sample code to send and receive SMS?

Thanks